To establish the equivalent relationship of anti penetration behavior of reinforced concrete and plain concrete, some parameters, such as initial velocity, penetration depth, crater diameter and carter depth were established by means of 25mm smoothbore gun. The results show that penetration depth decreases slightly with the increase of reinforcement ratio, the addition of steel bars is beneficial to improve the penetration resistance of concrete. DYNA software is used to simulate at the same vertical velocity penetration and perforation of concrete and reinforced concrete, the equivalent relation of thickness is obtained.